Hello, I am quite new in lwip. I setup a TCP server within lwip 141 and got an error while sending data through tcp_write function :
tcp_write : could not allocate memory for pbuf copy size 1092 I checked all the parameters which seems relevant for me (see below) but now I've got no idea why lwip could not allocate 1092 bytes on a pbuf. Here is how I send my data without using zero copy mechanism : if (tcp_sndbuf(tpcb) > byte_size) { err = tcp_write(tpcb, pt_send_buf, byte_size, TCP_WRITE_FLAG_COPY); } Some informations on my configuration : - #define PBUF_POOL_SIZE 256 - #define PBUF_POOL_BUFSIZE 1700 - #define TCP_MSS 1460 - #define TCP_SND_BUF 8192 - #define MEMP_NUM_PBUF 32 - The following line indicates me that the pbuf will be placed in RAM tcp_pbuf_prealloc(layer, length, mx, os, pcb, api, fst) pbuf_alloc((layer), (length), PBUF_RAM) Thanks for your help. -- Dimitri
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